TinyWall - Lightweight and non-intrusive firewall
HttpMaster - HttpMaster is a professional software tool for testing and debugging HTTP applications, primarily aimed at REST API applications and web services.
Windows 10 Firewall Control - Windows 10 Firewall Control: simple and exhaustive solution for applications network activity controlling and monitoring.
MockServer - Easy mocking of any system you integrate with via HTTP or HTTPS.
GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...
Request inspector - Debug web hooks, http clients